I think for Ochem kaplan is more than enough.
for Gchem, I would say as long as you can do all the kaplan's subject tests, (I mean learn to do them) and know the general concepts, you should be fine.
bio, I would say suppliment with some bio books, and full lengh tests (you should be spending twice of the time reviewing the test)
RCT and QRT, I have no idea, but I have heard as long as you can do kaplan's full lenghs and top score, you should be fine. Math in this test is very simple. Just read over trig rules and some probability.
good luck